Earlier quoted context omitted.
> Isn't a parliamentary system effectively proportional representation? Not necessarily. Imagine a country with four parties. In each constituency, they respectively get 40%, 30%, 20%, and 10% of the vote. Under FPTP, parliament is made up of all reps from the 40% party, shutting out other voters. Under PR, depending on variety you'd get results closer to the distribution of the votes: https://en.wikipedia.org/wiki/P…
But I don't think that's how it works? I think parliament works proportionally? See here: https://en.wikipedia.org/wiki/Parliament_of_the_United_Kingd... It is not the case that the conservative party got all the seats.
As the other comment said, a party can in theory get 100% of the seats/power with 51% of the vote.
FPTP was more relevant when local politics mattered and local MPs actually made a difference to lives in their local area.
Post-war the only decision making that matters is at the national level which FPTP cannot represent fairly.